Hair removal using the long-pulsed ruby laser

Williams, Ronda M.; Christian, M; Moy, Ronald L.

doi:10.1016/s0733-8635(05)70093-0

Cited by 6 publications

(8 citation statements)

References 7 publications

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“…This wavelength reportedly allows deeper penetration of energy, thus sparing the epidermis in subjects with darker skin phenotypes. It is well known that shorter wavelengths (ruby 694 nm 6,8,9,[11][12][13][14] and alexandrite 755 nm 4,5,10,15,16,20 ) are more capable of treating individuals with light skin and light-colored hair, whereas longer wavelengths (1064 nm Nd:YAG) 7,17,21,25,27,28 more efficiently target subjects with a dark hair and The present technology is different from the previously described diode laser systems in that it allows deliverance of high frequencies up to 4 Hz, along with its long wavelength making it suitable for dark skin phenotypes.…”

Section: Discussionmentioning

confidence: 99%

“…Initial technologies included laser such as the Ruby, alexandrite, and carbontargeted modified short-pulse Nd:YAG lasers. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17] These technologies have been shown effective in treating lightly colored hairs in fair-skinned individuals. However, the wavelength of these devices makes them nonsuitable for individuals with coarse, darker hair and dark skin phenotypes.…”

Section: The Laser Used In This Study Was Loaned To the Investigatorsmentioning

confidence: 99%

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The Use of a New Diode Laser for Hair Removal

Sadick

Prieto

2003

Dermatologic Surgery

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BACKGROUND. Diode and long-pulse 1064 Nd:YAG lasers, because of their long wavelengths and extended pulse durations, have gained popularity over the last several years for photoepilation in individuals with dark skin phenotypes. OBJECTIVE. To analyze the clinical efficacy and histologic features of a new 810-nm diode laser in the treatment of unwanted hair in individuals with Fitzpatrick skin types II-IV. METHODS. Twenty-four female subjects (mean age, 33; range, 17-53) were treated three times at monthly intervals with the MeDioStarâ diode laser (Zeiss-Meditech, Jenna, Germany): wavelength 810 nm, spot size 12 mm, pulse duration 50 msec; fluence 25-35 J. Patients had skin types II-IV and light to dark brown hair. Hair counts were carried out using handheld magnifiers at baseline and at months 1, 2, 3, and 6. Six

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Section: Discussionmentioning

confidence: 99%

Section: The Laser Used In This Study Was Loaned To the Investigatorsmentioning

confidence: 99%

The Use of a New Diode Laser for Hair Removal

Sadick

Prieto

2003

Dermatologic Surgery

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“…Thus, the energy produced by this laser can be used for cutting or volume ablation by tissue vaporization (Lee, 2008). Hair removal, skin resurfacing and tattoo removal are the most common applications where CW CO 2 laser plays a vital role (Williams et al, 1999;Stratigos et al, 1998). The results of laser treatment depend on the immediate interaction of incident light with tissues as well as the subsequent tissue regeneration and repairing.…”

Section: Introductionmentioning

confidence: 99%

The effects of different laser doses on skin

Abuarra¹

2012

Int. J. Phys. Sci.

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The laser-skin interaction was studied using the laboratory albino rat skin as an experimental sample and 10.6 μm wavelength CO 2 laser as a source of irradiation. This study aimed to determine the effect of different laser doses on the skin structure as a trial to understand how laser exerts its medical effects in treating skin problems. It also aimed to determine the relationship between the laser dose and biological effects and thus determine the lowest dose that had highest medical effects with lowest skin damage. Briefly, the rat skin was exposed to CW CO 2 laser at 12.5, 14.1, 15.6 and 17.2 W/cm 2 for 15 s. Directly after the exposure, biopsies of normal and exposed skin were preserved and fixed for histological studies. The images obtained from the compound light and electron microscopes exerted changes contributed to the interaction of the skin cells to the heat and energy produced by the continuous wave carbon dioxide (CW CO 2) laser during the exposure time. Basically, the tissue damage caused by the laser was mainly due to photothermal effect and increased gradually as the irradiation dose increased. Epidermal loss along with coagulation, homogenous hyalinization, lost of hair associated with shrinkage and collapse of hair follicle structures of varying depths at the-burn sites were detected in the histologic sections. Damage-power density (DPD) relationship was confirmed by measuring the damage depth using the software provided in the light microscope. On the other hand, Scanning electron microscopy (SEM) showed detailed images of the extensive epidermal epithelial cells damage which also increased by increasing the laser dose. Rough surface, partial destruction of intercellular junctions giving rise to loss of adherence between squamous cells and formation of narrow spaces between these cells were the most evident changes detected. The findings may help specialists to choose the best laser parameters for certain applications.

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“…The 694‐nm long‐pulsed ruby laser is indicated in light‐skinned (phototypes I–III) individuals with dark hair (7). The efficacy of this laser has been demonstrated (15–21). Efficacy ranges from 20% to 60% reduction after a single treatment (3) and 50% to 78% after multiple treatments (15–17).…”

Section: Hair Laser Technologymentioning

confidence: 99%

“…The efficacy of this laser has been demonstrated (15–21). Efficacy ranges from 20% to 60% reduction after a single treatment (3) and 50% to 78% after multiple treatments (15–17). In one study of 183 patients, subjects were treated with a 694‐nm, 3‐millisecond ruby laser at fluences ranging from 10 to 60 J/cm 2 , yielding a 75% hair loss at 6 months after multiple treatments (20).…”

Section: Hair Laser Technologymentioning

confidence: 99%

Laser hair removal

Wanner

2005

Dermatol Ther

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Since 1996, there have been numerous advances in hair laser removal that utilize melanin as a chromophore. All of the devices on the market may be used in patients with light skin (phototypes I-III) and yield hair reduction near 75%. The ruby (694 nm) laser, alexandrite (755 nm) laser, and diode (810 nm) laser, as well as intense pulsed light are commonly used devices for hair laser removal. The long-pulsed Nd:YAG (1064 nm) laser represents the safest device for hair removal in dark-skinned patients because of its long wavelength, although the diode laser, alexandrite laser, and intense pulse light may be used. For treatment of light hair, combination radiofrequency and optical devices as well as photodynamic therapy are under investigation.

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Hair removal using the long-pulsed ruby laser

Cited by 6 publications

References 7 publications

The Use of a New Diode Laser for Hair Removal

The Use of a New Diode Laser for Hair Removal

The effects of different laser doses on skin

Laser hair removal

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